Corrosion resistance of BN–ZrO2 ceramics with different additives by molten steel

• Published in: Journal of iron and steel research, international Vol. 29; no. 7; pp. 1101 - 1109
• Main Authors: Qian, Fan, Li, Hua-long, Yang, Wen-gang, Guo, Hai-rong, Liu, Guo-qi, Li, Hong-xia, Ma, Bei-yue
• Format: Journal Article
• Language: English
• Published: Singapore Springer Nature Singapore 01.07.2022
• Subjects: Applied and Technical Physics; Engineering; Machines; Manufacturing; Materials Engineering; Materials Science; Metallic Materials; Original Paper; Physical Chemistry; Processes; BN–ZrO; ceramic; Hot-pressing sintering; Side-dam; Thin strip continuous casting
• ISSN: 1006-706X; 2210-3988
• DOI: 10.1007/s42243-021-00696-x

BN–ZrO 2 ceramics with different additives such as SiC, Al 2 O 3 and MgAl 2 O 4 were fabricated by hot pressing sintering process to study sintering properties and corrosion resistance by the rotary immersion molten steel test. The results showed that SiC, Al 2 O 3 and MgAl 2 O 4 can improve the sintering properties of BN–ZrO 2 ceramics; especially, the introduction of SiC can significantly improve the hardness of the material; thus, the above compounds will help to improve the wear resistance of BN–ZrO 2 ceramics. The exposed oxide layer is in contact with molten steel and forms liquid phase after BN oxidation and B 2 O 3 volatilization, additives can significantly affect the properties of liquid phase, and m -ZrO 2 grains are sintered and grown by dissolution–precipitation mechanism by liquid phase. Consequently, Al 2 O 3 and MgAl 2 O 4 are more conducive to the formation of working layer with solid skeleton, which determines the corrosion resistance of BN–ZrO 2 ceramics.